BONE CUTTING METHOD FOR ALIGNMENT RELATIVE TO A MECHANICAL AXIS
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United States of America Patent
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app pub date -
Sep 13, 2013
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Mar 18, 2013
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Abstract
A method is disclosed herein for aligning a bone cutting jig for a bone cut relative to a mechanical axis. The method utilizes a three-axis accelerometer in a device to measure position, rotation, and tilt. The device is coupled to a bone-cutting jig. The bone-cutting jig is coupled to a bone. A joint of the bone is placed in a predetermined flexion. The joint end of the bone is rotated between a first point and a second point. As the joint rotates it pivots off a pivot point related to the mechanical axis. The joint rotation is monitored on a remote system. The device transmits data related to an arc made by the joint as it is rotated. The alignment of the bone relative to the mechanical axis is calculated from the three-axis accelerometer data. The bone-cutting jig is positioned to cut the bone based on the alignment measurement.
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